As the core skeleton of the bracket, the material properties of the solid steel part have a profound impact on the overall life. If common structural steel such as Q235B is used, after proper anti-corrosion treatment, such as hot-dip galvanizing, it can resist wind and rain erosion for 10-15 years in general outdoor environments. However, if it is in an industrial pollution area with high humidity and strong acid and alkali, its life may be shortened to 5-8 years. In coastal areas, due to the high salt content in the air, the corrosion to steel is extremely strong. Even with galvanized protection, it may only maintain an effective service life of 3-5 years. During this period, the steel will gradually develop rust spots, which will affect its strength and structural stability.
The durability of the green injection molding part is also critical. High-quality environmentally friendly engineering plastics, such as polycarbonate (PC) or reinforced nylon materials, have good weather resistance, UV resistance and certain chemical stability. Under normal outdoor lighting, temperature changes and slight chemical contact, it can maintain 8-12 years without obvious aging, cracking and discoloration. However, if it is exposed to high temperature for a long time, such as in desert areas or high-temperature industrial sites, the plastic part may accelerate aging, become hard, brittle or even cracked, and the service life may be sharply reduced to 3-5 years. In extremely cold areas, low temperature is a great challenge to the flexibility of plastics, and repeated freeze-thaw cycles may also cause damage to the internal structure of plastics, shortening its life to about 4-6 years.
When solid steel is combined with green injection molding parts, the sealing and stability of the connection parts become the weak links that restrict the overall life. If the connection process is not good, under long-term erosion by rain, dust, etc., gaps may appear, causing water to penetrate, accelerating the rusting of steel and the aging of plastics. In harsh working conditions with large vibrations, such as near industrial machinery or traffic arteries, the risk of loosening of such connection parts is higher. Once loosening occurs, the structural integrity of the entire bracket will be damaged, and the service life will be greatly reduced, which may only maintain a safe use time of 2-3 years.
In summary, the service life of the 7-shaped solid steel green injection molding bracket outdoors or in harsh working conditions is affected by a variety of factors and generally ranges from 3 to 15 years. To extend its service life, regular inspections and maintenance can be carried out, rusted steel can be promptly derusted and repainted, and aging plastic parts can be replaced or protected to ensure that the connection parts are always stable and reliable.
